I have a problem with tests results trend graphs from BIRT charts plugin 3.0.3 on Hudson 3.1.2 : they are not displayed on any Hudson job I have configured, all I have is a red cross and the alternate text (see attachment).

It is installed on a Tomcat 7.0.52 server.
OS is Windows XP Professional Version 2002 Service Pack 3 (!!)
JDK version used for the jobs is 1.6.0_45.
Maven version is, depending on the job, either 2.0.7 or 3.2.1.

The URL corresponding to the generated image seems to be incorrect. Right click on the broken image and select "View Image Info" (Firefox) or "Open Image on a new Tab". Find the Location URL and check if it is correct.

Probably Hudson may be using wrong base URL. You can specify the correct base URL bu setting value the value at "Hudson URL" at Manage Hudson -> Configure System -> E-mail Notification